This isn't bad, but the chamber is much bigger than it needs to be, which makes it harder to get a sense of where you're going or what you're doing. I'm also not sure what the first turret is all about, it seems a bit unnecessary to me, and doesn't give you much time to react to it.

If you reduced the size of the chamber to focus on the puzzle it would be a very nice chamber. Oh, and you need to deportal a couple of surfaces near the exit door height because it's quite easy to get up there at the moment which takes away the entire puzzle.